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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <memtrack/memtrack.h>
#define LOG_TAG "memtrack"
#include <log/log.h>
#include <hardware/memtrack.h>
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
static const memtrack_module_t *module;
struct memtrack_proc {
pid_t pid;
struct memtrack_proc_type {
enum memtrack_type type;
size_t num_records;
size_t allocated_records;
struct memtrack_record *records;
} types[MEMTRACK_NUM_TYPES];
};
int memtrack_init(void)
{
int err;
if (module) {
return 0;
}
err = hw_get_module(MEMTRACK_HARDWARE_MODULE_ID,
(hw_module_t const**)&module);
if (err) {
ALOGE("Couldn't load %s module (%s)", MEMTRACK_HARDWARE_MODULE_ID,
strerror(-err));
return err;
}
return module->init(module);
}
struct memtrack_proc *memtrack_proc_new(void)
{
if (!module) {
return NULL;
}
return calloc(sizeof(struct memtrack_proc), 1);
}
void memtrack_proc_destroy(struct memtrack_proc *p)
{
enum memtrack_type i;
if (p) {
for (i = 0; i < MEMTRACK_NUM_TYPES; i++) {
free(p->types[i].records);
}
}
free(p);
}
static int memtrack_proc_get_type(struct memtrack_proc_type *t,
pid_t pid, enum memtrack_type type)
{
size_t num_records = t->num_records;
int ret;
retry:
ret = module->getMemory(module, pid, type, t->records, &num_records);
if (ret) {
t->num_records = 0;
return ret;
}
if (num_records > t->allocated_records) {
/* Need more records than allocated */
free(t->records);
t->records = calloc(sizeof(*t->records), num_records);
if (!t->records) {
return -ENOMEM;
}
t->allocated_records = num_records;
goto retry;
}
t->num_records = num_records;
return 0;
}
/* TODO: sanity checks on return values from HALs:
* make sure no records have invalid flags set
* - unknown flags
* - too many flags of a single category
* - missing ACCOUNTED/UNACCOUNTED
* make sure there are not overlapping SHARED and SHARED_PSS records
*/
static int memtrack_proc_sanity_check(struct memtrack_proc *p)
{
(void)p;
return 0;
}
int memtrack_proc_get(struct memtrack_proc *p, pid_t pid)
{
enum memtrack_type i;
if (!module) {
return -EINVAL;
}
if (!p) {
return -EINVAL;
}
p->pid = pid;
for (i = 0; i < MEMTRACK_NUM_TYPES; i++) {
memtrack_proc_get_type(&p->types[i], pid, i);
}
return memtrack_proc_sanity_check(p);
}
static ssize_t memtrack_proc_sum(struct memtrack_proc *p,
enum memtrack_type types[], size_t num_types,
unsigned int flags)
{
ssize_t sum = 0;
size_t i;
size_t j;
for (i = 0; i < num_types; i++) {
enum memtrack_type type = types[i];
for (j = 0; j < p->types[type].num_records; j++) {
if ((p->types[type].records[j].flags & flags) == flags) {
sum += p->types[type].records[j].size_in_bytes;
}
}
}
return sum;
}
ssize_t memtrack_proc_graphics_total(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_GRAPHICS };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types), 0);
}
ssize_t memtrack_proc_graphics_pss(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_GRAPHICS };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types),
MEMTRACK_FLAG_SMAPS_UNACCOUNTED);
}
ssize_t memtrack_proc_gl_total(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_GL };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types), 0);
}
ssize_t memtrack_proc_gl_pss(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_GL };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types),
MEMTRACK_FLAG_SMAPS_UNACCOUNTED);
}
ssize_t memtrack_proc_other_total(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_MULTIMEDIA,
MEMTRACK_TYPE_CAMERA,
MEMTRACK_TYPE_OTHER };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types), 0);
}
ssize_t memtrack_proc_other_pss(struct memtrack_proc *p)
{
enum memtrack_type types[] = { MEMTRACK_TYPE_MULTIMEDIA,
MEMTRACK_TYPE_CAMERA,
MEMTRACK_TYPE_OTHER };
return memtrack_proc_sum(p, types, ARRAY_SIZE(types),
MEMTRACK_FLAG_SMAPS_UNACCOUNTED);
}
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